Results 231 to 240 of about 2,709 (250)

Polarization property analysis of a periscopic scanner with three-dimensional polarization ray-tracing calculus

Applied Optics, 2016
The polarization properties of a two-axis periscopic optical scanner constituted by a pair of rotating planar mirrors have been studied by using the three-dimensional polarization ray-tracing matrix method. The separate and cumulative matrices that define the transformation of the polarization state are obtained and expressed in terms of the rotation ...
Yufei, Yang, Changxiang, Yan
openaire   +2 more sources

Shape Estimation of Transparent Objects by Using Inverse Polarization Ray Tracing

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2007
Few methods have been proposed to measure three-dimensional shapes of transparent objects such as those made of glass and acrylic. In this paper, we propose a novel method for estimating the surface shapes of transparent objects by analyzing the polarization state of the light.
Daisuke Miyazaki, Katsushi Ikeuchi
openaire   +2 more sources

Characterization of DKIST retarder components with polarization ray tracing

SPIE Proceedings, 2014
Super achromatic retarders and polychromatic modulators are required to meet the polarimetry specifications of the Daniel K. Inouye Solar Telescope. These components have been analyzed and toleranced using a birefringent polarization ray trace over wavelength and field of view.
Stacey R. Sueoka, Russell A. Chipman, David F. Elmore   +2 more
openaire   +1 more source

Three-dimensional polarization ray tracing in electro-optic crystals

Optics Communications, 2020
Abstract Electro-optic crystals are extensively utilized to manipulate polarized light. In this paper, a general and accurate three-dimensional polarization ray tracing calculus for characterizing the evolution of polarization state in electro-optic crystals is reported for the first time.
Peng Zhang, Xiaoping Du, Jing Wu, Yishuo Song, Yu Jia, Jun Sun, Jiguang Zhao   +6 more
openaire   +1 more source

Polarization opposition effect and second-order ray tracing

Applied Optics, 2002
I develop a second-order ray-tracing model of the light scattered by a cloud of randomly oriented facets having sizes much larger than the incident wavelength. My results suggest that both symmetric and asymmetric branches of the polarization opposition effect can be produced by the same mechanism responsible for the photometric opposition effect, i.e.,
openaire   +2 more sources

Ray Tracing and Use of Shadows as Features for Determining Location in Lunar Polar Terrain

2021
Ice is the most valuable resource on the Moon. It exists only at the poles where shadows are extensive and drivable routes are short. Robot routes to reach this ice are tenuous. Sun-synchronous lunar polar routes offer order-of-magnitude greater duration and range if such routes are achievable. Sun-synchrony is brittle in the sense that a rover must be
Eugene Fang, William (Red) L. Whittaker
openaire   +1 more source

General polarized ray-tracing method for inhomogeneous uniaxially anisotropic media

Journal of the Optical Society of America A, 2008
Uniaxial optical anisotropy in the geometrical-optics approach is a classical problem, and most of the theory has been known for at least fifty years. Although the subject appears frequently in the literature, wave propagation through inhomogeneous anisotropic media is rarely addressed.
Sluijter, M. (author), De Boer, D.K.G. (author), Braat, J.J.M. (author)   +2 more
openaire   +4 more sources

Parry arc: a polarization lidar, ray-tracing, and aircraft case study

Applied Optics, 2000
Using simple ray-tracing simulations, the cause of the rare Parry arc has been linked historically to horizontally oriented columns that display the peculiar ability to fall with a pair of prism faces closely parallel to the ground. Although we understand the aerodynamic forces that orient the long-column axis in the horizontal plane, which gives rise ...
K, Sassen, Y, Takano
openaire   +2 more sources

Polarization ray tracing in thermally loaded solid-state laser crystals

Journal of the Optical Society of America B, 2020
A new ray tracing method for the propagation of electrical fields in inhomogeneous and weakly anisotropic media is presented. With this method, we can efficiently simulate the propagation of laser beams in solid-state laser amplifiers, which suffer from high thermal loads.
Phillip Lino Rall, Christoph Pflaum
openaire   +1 more source

Investigation of propagation algorithms for ray-tracing simulation of polarized neutrons

Journal of Neutron Research, 2014
Ray-tracing of polarized neutrons faces a challenge when the neutron propagates through an inhomogeneous magnetic field. This affects simulations of novel instruments using encoding of energy or angle into the neutron spin. We here present a new implementation of propagation of polarized neutrons within the McStas simulation package and show that it ...
Knudsen, E.B., Rømer, Astrid Tranum, Willendrup, Peter Kjær, Christiansen, P., Lefmann, Kim   +4 more
openaire   +2 more sources